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| Component importance evaluation of frame structures considering the contributions of internal forces |
| Received:November 12, 2016 Revised:February 04, 2017 |
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| DOI：10.7511/jslx201706009 |
| KeyWord:frame structure importance evaluation of components internal and resisting forces of components partial importance coefficients integrated importance coefficients |
| Author | Institution |
| 张立森 |
福州大学 土木工程学院, 福州 |
| 方圣恩 |
福州大学 土木工程学院, 福州 ;福州大学 土木工程防震减灾信息化国家地方联合工程研究中心, 福州 |
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| Abstract: |
| A component importance evaluation method for frame structures under horizontal and vertical loads is developed in this paper.The strain energy equation,together with the node-external force relationships of frame components,is first used to calculate the axial forces,shear forces and bending moments of beams and columns.Then component-level partial importance coefficients are defined based on the ratios between the calculated internal forces of components and their resisting forces.The coefficients embody the utilization levels of the resisting forces of components.Subsequently integrated importance coefficients are defined using the combinations of different partial coefficients,which reflect the component contributions to the entire load capacity of a frame structure.Lastly,the feasibility of the developed method is verified against two different frame structures.The analysis results demonstrate that the method can provide quantitative evaluations for the optimal design and the progressive collapse design of frame structures. |